Deliver public assets through CDN for Axum

Summary

Cdn assets for a Axum app on Ample. Verified on Axum: a versioned, immutable-cached asset uploaded to a published bucket and served from the CDN URL. Build and start: cargo build --release in the rust builder image (stable toolchain, Cargo.lock committed, pure-Rust dependencies), then the release binary on the ubuntu-24.04 template reading PORT and DATABASE_URL.

Resource Requirements

• Compute
• CDN

Infrastructure Requirements

• Compute

  • Status: Verified
  • Summary: Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.

• CDN

  • Status: Verified
  • Summary: The CDN host serves objects from published buckets. It does not front app compute and is not a cache or key-value store.

Prerequisites

• A Axum project (cargo build --release in the rust builder image (stable toolchain, Cargo.lock committed, pure-Rust dependencies), then the release binary on the ubuntu-24.04 template reading PORT and DATABASE_URL)
• A bucket from ample bucket create with credentials passed as encrypted S3_* environment variables
• An Ample account token with servers:write, buckets:read

Workflow Steps

1. Build and start
   cargo build --release in the rust builder image (stable toolchain, Cargo.lock committed, pure-Rust dependencies), then the release binary on the ubuntu-24.04 template reading PORT and DATABASE_URL; the server must bind 0.0.0.0 on PORT.

2. Publish a bucket for public assets
   Publish only the asset bucket; upload versioned keys with an immutable Cache-Control header and build URLs from its public URL.

   Command: ample bucket publish

3. Verify
   Fetch the live URL and /p/versioned-static-assets on the example; on failure read the build and runtime logs.

   Command: ample logs --kind build

Limitations

• Verified on the ubuntu-24.04 template at s-1vcpu-2gb; other sizes and Axum major versions are not verified.
• Region, compliance attestation and request-duration limits are unknown and not claimed.
• The CDN serves published-bucket objects only; cache rules, purge and TTL control are not verified.

Cost Estimate

• Currency: USD
• Monthly Amount: 5.0
• Basis: Size prices from pricing.toml (loaded by the API) at build revision 1ac5595375130d45290090e82ed0f554ccd45405-dirty
• Components:
  • Name: app server
    • Size: s-1vcpu-1gb
    • Quantity: 1.0
    • Monthly Amount: 5.0

Evidence Summary

• Kind: Canary run
• Summary: Axum pattern fixture deployed on Ample (cargo build --release in the rust builder image (stable toolchain, Cargo.lock committed, pure-Rust dependencies), then the release binary on the ubuntu-24.04 template reading PORT and DATABASE_URL); for this guide: a versioned, immutable-cached asset uploaded to a published bucket and served from the CDN URL.
• Observed At: 2026-09-21T02:46:37Z
• Expires At: 2027-03-20T02:46:37Z

Formats

• HTML: Guide
• Markdown: Guide
• JSON: API Link

Next Actions

• Browse the catalog index
• Search published recipes by intent, stack, and constraints
• Prepare a side-effect-free deployment plan for an authorized project
• Read the existing agent authentication setup
• Browse Axum
• Browse Add CDN
• Browse Versioned static assets